ectogenous

adjective

1. growing outside the body of the host, as certain bacteria and other parasites.

adj.

1. Having the ability to live and develop outside a host, as certain pathogenic microorganisms.
2. Exogenous.

1. Able to live and develop outside a host, as certain pathogenic bacteria.
2. Originating or produced from outside an organism, tissue, or cell; exogenous.